| With the great development of digital TV technology, TV stations at all levels create more and more television channels, which requires more video media to meet the needs of all levels of television program requirements, scope to expand sources of television media program, from the single national licensing for film and television production expanded to obtain, from imported from the network, the purchase and small producers or amateur photography enthusiasts, these ways to enrich the program source and content, but also brought many problems, such as video package format for transmission is not suitable for radio and television network and playing content; there is video files, video files to selective cutting; when the length is too short, the need for multiple video files on; there are many data stream media file, need for selection and extraction of audio and video stream, while the foreign video editing system prices too high, complex operation, application is not suitable for the local TV station.High standard definition video program on the radio and television industry in the string as the main research object, the method to slove the problem expounds video program production process, the following work is done:1. Through the analysis of the codec and packaging format, designed a set of analysis program to support a variety of packaging format and the coding method, to obtain the parameters of procedures to support the file format video files of calibration and validation.2. The parameter information acquisition, designs the multi streaming video file shunting operation, addition of ideas of nonlinear in the process of video files, support for playback and string processing into the point process and the point set. Through the video file into the set point, can not content cut in a video file, or a plurality of program segments of a video file in a string into a new program files; at this time, the string operations into string for file input module and output module string for file, solves the multi video the file on the package format and encoder, different problems, re set for new video file code.3. Common video processing software is generally used in video image sequence accuracy and precision of this group, can not meet the requirements for the accuracy of TV video. In this paper, playing and string operation, to achieve the design frameaccuracy, the completion of the frame to frame, frame, frame back positioning accuracy of transcoding and string processing.4. The results should be validated and analyzed, and were compared with the same type of domestic and foreign software... |
